A KKK grand wizard was abducted by Aliens.
"Why the f**k did you abduct me?" he asked, terrified.
"I think you need a wakeup call. Because if you can't accept beings that are nearly exactly like you genetically, how the f**k can your species accept us? Look, I want to show you something."
"This is your body." A facsimile of the wizard's body appeared before him. Then its skin fell off. "This is your body without skin." Then a black man's body appeared next to the flayed body,and was flayed.
"See same color, red. Except that's not really your true nature either. When your mind sees your blood, it looks red only because your brain evolved to see it that way. But oh, you're red alright, a red so red your eyes aren't made to see it! You're violet too. You knew that everything is a vibration, mathematics, and the rainbow is just a tiny straitjacket that keeps your kind sane? Yet even the monochrome is too vast for some of your kind to perceive."
"I ... take offense to that. And what color are you?" The grand wizard asked.
"I am."